The question is what happens if one of the zookeeper crashes. Will the
broker on that node also will crash?
If 1/3 zookeeper nodes crashes, the other two will take over. Kafka broker
will not crash. However, you should not run zookeeper and kafka on the same
server in production.
What happens if broker crashes? I suppose other two brokers will take the
load.
Yes, the other two will take the load, but it also depends on the number
of partitions and how they are distributed across cluster.
Now what happens if 2 zookeeper nodes crashes.
Or if 2 brokers crashes. Will my cluster be still working in this case.
If 2 zookeeper nodes crash, there's no longer a majority and your cluster
will be down. If 2 kafka brokers crash and you have replication factor 3
you should be OK, but as in previous answer - it depends on the number of
partitions and how they're spread in the cluster.
So basically what is the difference between zookeeper failure and
server/broker failure.
Again, you shouldn't run zookeeper and kafka on the same server in
production. So the difference is that while kafka is responsible for data,
zookeeper is coordinating tasks between kafka nodes.
On 2016.11.08 17:12, Sachin Mittal wrote:
Hi,
We have following setup.
1. Three instances of zookeeper on three machines.
2. Three instances of kafka server on same three machines.
3. All the topics have replication factor 3.
So when we create a topic on any node, i see that it gets replicated on
all
three instances.
I also see that topic data is getting replicated to all three nodes.
The data to main topic is written by three producers to which all three zk
nodes config is provided in connect string.
This is all working fine.
The question is what happens if one of the zookeeper crashes. Will the
broker on that node also will crash?
What happens if broker crashes? I suppose other two brokers will take the
load.
Now what happens if 2 zookeeper nodes crashes.
Or if 2 brokers crashes. Will my cluster be still working in this case.
So basically what is the difference between zookeeper failure and
server/broker failure.
Thanks
Sachin
